Mendo wrote:

I plan on installing an inverted L outdoor antenna on my metal mobile home
and I will have a SW radio in each of 3 different rooms. Can I just tap
off the antenna to all 3 radios, and use one at a time, or is there a
better way?

For simultaneous mode you need a distributer or splitter.
For a cheaply solution use an antenna switch to change between this three.

Regards,

Ralf
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Vy 73 es 55 de Ralf, DL2MRB